/*
 * @(#)ConstraintType.java        1.0 19-Apr-2009
 *
 * Copyright 2008 Thomas Ford. All rights reserved.
 */


package edu.napier.soc.xfdm.model;

/**
 * A type of constraint.
 *
 * @author Thomas Ford
 * @version 1.0, 17-Apr-2009
 */
public enum ConstraintType {

	/**
	 * Not-null.
	 */
	TOTAL,

	/**
	 * Cannot change value after being assigned a not-null value.
	 */
	FIXED,

	/**
	 * Unique.
	 */
	UNIQUE
}